It's a world with Superman, General Zod, probably Wonder Woman and the Flash at least. Riddler and Penguin are easy. If they can do Joker, they can do Riddler/Penguin. It's not like we're talking about Man Bat or Mr Freeze. This IS a world that has super-powers after all.

__________________"Every time you open that dvd box to watch the Dark Knight, it's actually a slice of baloney. the real movie is in your mind and Nolan performed an Inception on all of us." - tacit-ronin-